[Blind ureters. Proposed classification and study of the national statistics with the contribution of 2 cases]

The authors put forward the bases for a classification of the different kinds of B.U., according to the direction which it takes, the situation of the blind end and the accompanying, renoureteral malformations in the system itself. They review the Spanish statistics in which 38 cases of 6 kinds are compiled, included among the 15 in the classification suggested, as well as presenting two of their own. They refer to the possible ischemic cause of this anomaly.